Best way to lower compression in motor
12-23-2003, 07:00 PM
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Best way to lower compression in motor Ok well im currently in the process of rebuilding my motor with a forged 348 from speed inc with vavle reliefs, with GTP Stage 2+ LS6 heads with a relatively large came, havent decided on what yet, and a rather healthy dose of juice. But in a year or so I plan on going the FI by adding a CAS twin turbo kit and a TH400. My question is what is the best route when I want to lower my compression on the motor the second time around with out wasting alot of money. Should I get -8.6cc pistons put in the motor or maybe look into 6.0 liter heads or the AFR 76cc heads assuming they make what they claim? So to lower compression later on should I do heads or pistons? I plan on running quite a bit of boost.
12-23-2003, 09:26 PM
#4
I would go with like 15cc dish pistons, a 6.125 rod and some decent 5.3 or 6.0 heads with small chambers this year...when you add the turbo, just swap out for AFR 76 cc and you'll be near 8.5 to 1...or 72 cc patriots and your still low enough for the turbo.
12-25-2003, 07:19 AM
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I would do pistons. Why would you what to do another set of heads when you have a nice set. I haven't priced heads in a while but your comparing 2500.00 vs. 700.00 for pistons. Plus putting in pistons will give you a chance to make sure everything is wearing ok before the big boost.